Improved grate-ear



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Witnesses'.

NPETERS. PHOTO-LITHOGRAPHEH WASH NGTON D C diluted -tatr @wat @imite L. F. LAKEY AND W. B.V HAYTE, 0F QUINCY, ILLINOIS.

Leners Patent No. 95,812,01ad october 12,1869.

IMPRQVED GRATELBAR.

The Schedule referred to in these Letters Patent and making part of the same.

,description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, making a part of this specification. v

The nature of our invention consists in the construction of a grate-bar, and in the arrangement of the devices hereafter set forth and explained.

Figure 1 is'a rear view of our invention.

Figure 2 is a Section view of the same.

Figure 3 is a perspective of the same, with dii'erent-shaped bars. e p b Figure 4 is a perspective of one of the round hollow ars.

When fires are built upon the common grates, a large portion of the fuel is drawn up the Hue, in various forms, without havingrbeen consumed, and is thus lost, without having accomplished any good. In order to prevent this, we propose to form a hot-air ue, in connection with hollow bars, so that all of the gases, &e., shall be consumed and madev to contribute their proportion of heat.

Letter A represents the grate-bars, which may be of two shapes, either perfectly round, (as seen in tig. 4,) or they may be flat upon their tops, and bevelled toward the bottom, on both sides, and have av rib or ange, c, formed on their bottoms.

The bevelled bars have tenons formed on their front ends, which vextend through the frame of the air-chamber B, while their rear ends rest vin notches of suitable shape, formed in the plate d, thus making them removable, vat pleasure.

As allot' the bars are hollow, when a fire is built upon them, a current of,l air is started through them into the air-chamber adjoining. This chamber being heated by the iire, through the slauting movable plate B', becomes so hot, that being brought into contact with the gases and other combustible materials springing from the fire, by means of an opening from the airchamber, just below the mouth of the ue, consumes the gases, 85o., before they enter it. The chamber thus becomes a safeguard from the effect of the gases, sparks, or other combustible materials, and also increases the draught of the lire, and requires a less amount of fuel to create the same heat.

Having thus described our invention,`

Vthat we claim, and desire to secure by Letters Patent, is-

'lhe construction and arrangement of the bars A A and movable lplate B', with the airchamber B, substantially as shown and described.`

In testimony that we claim the foregoing, we have hereunto set our hands, this 25th day of May, 1869.

- L. F. LAKEY.

W. B. HAYTE. Witnesses:

J. P. DEANE, H. HEAD. 

